Your tungsten lamp should have a practically constant light output during the exposure, so no need to 'compensate.' You would not want to have the sensor reading any colored light from the head if you are using the dichroic filters in the head. I will really mess up your exposures.
If you were thinking you'd have the sensor read the color of the filtered light and predict the exposure you would need to do some modifications. For example you would probably need 3 sensors. One for each of the emulsions in Ilford MG paper. Then you'd need to filter each one for the corresponding sensitivity. Then you'd need to integrate the readings of the 3 probes with some sort of summing op amp. Then you'd need to calibrate the whole ordeal. You'd be forging new territory as no commercial system has been produced to do that. Usually one would measure the white light only and then apply the filter. That is how the computerized color system works on the Omega D5500.
I'm actually posting based on experience. I tried to calibrate the baseboard color sensor of the D5500 Translator to the sensitivity of the green and blue layers of Ilford MG paper using a stack of empirically derived filters. Such that it would maintain the middle gray exposure for Ilford MG paper during a yellow/magenta filter change. I spent a lot of time on it but the human eye is so sensitive to such small changes in gray level, calibrating the system was futile.
Last edited by ic-racer; 01-14-2013 at 01:44 PM. Click to view previous post history.